When vent pipes pass through a roof, a storm collar helps create a waterproof seal and a snug fit around the pipe. The right collar prevents leaks and wind-driven moisture from seeping into the home. This guide highlights five practical options that balance durability, fit adaptability, and installation ease. Each product below is designed to work with common vent sizes while offering features like adjustable tabs and galvanized steel construction for long-lasting performance.
| Product | Brand | Fits | Key Feature |
|---|---|---|---|
| Water-Tite 81590 | Water-Tite | 6″ Pipes | Adjustable slip tab; locking tab |
| Water-Tite 81591 | Water-Tite | 7-9″ Pipes | Adjustable slip tab; locking tab |
| Water-Tite 81602 | Water-Tite | 6″ Pipes | Stamped Type B; waterproof seal above flashing |
| Water-Tite 81589 | Water-Tite | 5″ Pipes | Adjustable slip tab; locking tab |
| Water-Tite 81598 | Water-Tite | 4″ Pipes | Stamped Type B; waterproof seal above flashing |
Choosing the right storm collar involves sizing accuracy, material quality, and installation features. The options below emphasize galvanized steel construction, adjustable fittings, and secure locking mechanisms to help homeowners and installers achieve a reliable roof penetration seal.
Water-Tite 81590 Adjustable Type B Vent Storm Collar
- Brand: Water-Tite
- Fits: 6″ pipes
- Material: 28 gauge G-90 ASTM-A653 CS galvanized steel
- Key features: Adjustable slip tab provides a snug fit around the vent; locking tab secures installation
This 6-inch Type B storm collar is designed to create a waterproof seal where the vent passes through the roof. The adjustable tab enables a secure fit around common vent diameters, while the locking tab aids in a confident, leak-resistant installation above the flashing.
Water-Tite 81591 Adjustable Type B Vent Storm Collar
- Brand: Water-Tite
- Fits: 7-9″ pipes
- Material: 28 gauge G-90 ASTM-A653 CS galvanized steel
- Key features: Adjustable slip tab; locking tab secures installation
This collar covers a broader range of vent pipe sizes, making it a versatile option for retrofit projects or varying vent diameters. The adjustable tab helps ensure a tight seal against moisture around the vent penetration.
Water-Tite 81602 Stamped Type B Vent Storm Collar
- Brand: Water-Tite
- Fits: 6″ pipes
- Material: 28 gauge G-90 ASTM-A653 CS galvanized steel
- Key features: Waterproof seal where the stack passes through the roof; installed directly above the flashing
This stamped Type B collar emphasizes a waterproof seal above the flashing, helping to prevent water intrusion at the roofline. It is suited for standard 6-inch vent penetrations with a straightforward installation process.
Water-Tite 81589 Adjustable Type B Vent Storm Collar
- Brand: Water-Tite
- Fits: 5″ pipes
- Material: 28 gauge G-90 ASTM-A653 CS galvanized steel
- Key features: Adjustable slip tab; locking tab secures installation
This 5-inch collar offers a snug seal for smaller vent penetrations. The adjustable tab accommodates minor variances in pipe size, while the locking tab ensures a secure hold during roof exposure.
Water-Tite 81598 Stamped Type B Vent Storm Collar
- Brand: Water-Tite
- Fits: 4″ pipes
- Material: 28 gauge G-90 ASTM-A653 CS galvanized steel
- Key features: Stamped Type B; waterproof seal above flashing
This stamped 4-inch collar is designed for small-diameter vents. It provides a dependable waterproof seal at the roof line and is installed directly above the flashing for consistent performance.
Metal Storm Collar (10 Inch)
- Brand: Generic
- Fits: 10″ inner diameter (large vents)
- Material: 26 gauge galvanized steel
- Key features: Adjustable tab; multiple sizes available
This general-purpose storm collar covers larger vent penetrations and can help divert water away from the pipe. The adjustable tab allows a quick, secure fit across various roof configurations and pipe diameters.
Buying Guide
Key considerations when selecting a storm collar for vent pipes include size compatibility, material quality, and installation features. The right collar should:
- Match the vent pipe diameter or provide a secure adjustable range that fits typical residential vents (4″-9″ is common).
- Be made from corrosion-resistant galvanized steel (18-28 gauge) for durability in roof environments.
- Offer an adjustable tab or slip-fit design to ensure a snug seal around the pipe without gaps.
- Include a locking mechanism to secure the collar after placement and resist wind uplift.
- Work with the roof flashing to create a continuous waterproof barrier above the flashing details.
- Consider stamped vs. un-stamped designs for specific flashing configurations and ease of installation.
- Factor in climate considerations, such as heavy rain, snow load, and UV exposure, which affect long-term performance.
In practice, selecting a storm collar often involves balancing size range with installation ease. A collar that stays securely around the vent and seals effectively at the roof line reduces the risk of leaks and mitigates moisture intrusion. For retrofits, collars with adjustable tabs simplify fitting to existing penetrations. For new installations, stamped designs that align with standard flashing layouts can speed up installation while maintaining a weatherproof seal.